Pipe-tongs.



H. G. JOHNSTON.

PIPE TONGB. APPLIOATI on run us. an. 1011.

:use the same.

HORACE G; J'OHNSTGN, or GORSICANA, TEXAS;

PIPE-Tends Specification of Letters Patent.

a li ation filed April 29, 1911. Serial No. 624,098.

Patented Feb. 13, 1912.

To all whom it may concern:

Be it known that 1, Homes G. JOHNSTON, a citizen .of the United States, residing at Corsicana, in the county of Navarro and State of Texas, have invented certain new and useful Improvements in Pipe-Tongs; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art. to which it appertains to make and This invention relates to rota well boring machinery and has for an ob ect to provide an apparatus for use in conjunction with the rotary machines especially a rotary such as is described in applicants Patent No. 959,351, issued May 24th., 1910 and when applied thereto for uncoupling easing tubes and other well pipes employed.

A further object of the invention is to provide a pipe tong adapted to be carried upon and used by a rota machine such as described in said patent 0 such construction that it may remain upon and in association with said machine when not in actual use and in position to be quickly and readily moved r swung into position for operation when desired.

A further object of the invention is to provide an improved pipe tong adapted to be pivot-ally mounted upon uprights carried upon the base of a rotar machine and. also upon the rotary table to be used in conjunc tion for unscrewing or disconnecting pipe sections.

With these and other objects in view the invention comprises certain novel construe tions, combinations and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawings, the figure is a erspective view of a rotary machine provi ed with uprights and with the improved pipe tong applied thereto.

Like characters of reference designate corresponding parts throughout the several views.

The rotary machine used in association with this pipe tong is substantially like that described in the said Patent No. 959,351 embodying the base 10 and rotating table 11 u on the former of which is erected an u rlght 13 by being inserted in one of t e sockets 14 while the rotary table is provided with one or more uprights .15 likewise incloscd in said patent. tong which forms the subject matter of this serted in one of the sockets 16. With the exception of a hook or crook at the upper end of one of the uprights the device (1esoribed is similar in all respects to that dis- The improved pipe application is adapted for use in association with said rotary and comprises a link mem ber 17 having a hole or opening 18 adapted to slip over and fit upon either of the uprights 13 or-15 as may be found desirable; two of such pipe tongs being employed with each rig To the link member 17 a lever member 19 is pivoted as at 20 and free to swing upon said link member which may also if desired swing about the uprights 13 and 15. The principal use of the link 17 is to permit such swinging movement of the lever 19 and also to accommodat a diflerl nce in length be tween the uprig ts and the pipe under varyingconditions. The lever 19is provided at its end opposite the pivot 20 with a serrated face 21 while a 'jaw member 22 is pivoted to said lever as at 23 to grip the p1 e in the usual well known manner: The ormation of the hook shaped jaw member and the serrated face 21 and their co-action will be so apparent as to require no further planation or disclosure.

In use two of the tongs are mounted upon the uprights of the base and the rotating table respectively as shown at Fig. 1 and the rotating table started in the usual manner. Such starting of the rotary table moves the tong which is connected thereto and carried thereby and moves therewith the section of the pipe or the section of the coupling which it is gripping. The other tong which is held rigidly by attachment to the upright of the base holds the other pipe section against ro tation whereby the continued movement of the rotary table unscrews the parts. When the parts have been disconnected the tongs are readily and easily disconnected from the pipe or fromithe coupling to which they are connected and are swung around out of operative position either by swinging upon the pivo ts 20 or upon the uprights 13 or 15.

. In the drilling of large wells where the -casing is oftentimes from ten to fourteen inches the pipe tongs employed become of necessity very large and very heavy under ordinary conditions requiring several men to lift and place upon the pipe sections.

With the device as shown the tongs remain constantly in position and may be swun into operative relation with the pipe an connected up easily, quickly and readily by one man and without requiring a great degree of strength. The saving of time is also a ver important element.

I c aim i 1. The combination with a rotary well drilling machine comprising a stationary base and rotating table with uprights up standing from each, of collars surrounding the uprights and pipe tongs pivoted to the collars in such manner as to be supported by the collars and uprights in horizontal position.

2. The combination with an upright, of a collar surrounding and rotatable upon the upright, and pi e tongs pivoted to the collar and ca able 0 movement in a horizontal plane :1 out the upright.

In testimony whereof I afiix my signature in presence of two witnesses.

HORACE G. JOHNSTON.

Witnesses:

L. L. MoRmLL, W. J. CHENEY. 

